White widow has a bad fungus gnat problem the soil is not drying out like the others. I’ve mixed up the solution shown at medium dose my question is even though the soil is moist still should I drench all plants in this or wait on the still moist ones to dry out more.
Just apply it in the regular watering with the feed.
reapply every week till they are all gone.
monitor it with clean sticky traps after the fact. if you see more then time for more. The duel application should be enough though. BTi is verry effective in killing gnats.
Adult fungus gnats only live for about a week, but the eggs they lay will sit in the soil for three days and hatch into nymphs, which will live in the soil for about two weeks before growing wings.
What mouse said.
They need moisture in top 1"2 inch for egg reproduction. I imagine you want to transplant to bigger pots, you will need to dry out the medium for that anyway. No point killing them if you don't deal with eggs.
If you see that applying the solution will amount to overwatering - wait.
The point is to apply solution without stressing plants.
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